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Drilling Cos. Clash Over Borehole Patent

Law360 (June 15, 2009, 12:00 AM EDT) -- National Oilwell Varco LP has filed suit against rival Auto-Dril Inc. for allegedly infringing a patent related to automatic drilling systems for oil and gas exploration.

The complaint, lodged Friday in the U.S. District Court for the Eastern District of Texas, alleges Auto Dril willfully infringes the patent-in-suit by making and selling a line of products that fall within the scope of the patent’s claims.

Midland, Texas-based Auto-Dril provides drilling instrumentation and services that infringe U.S. Patent Number 5,474,142, titled “Automatic drilling system,” according to the...
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